Burner.



G. S. CHRISMAN.

BURNER.

APPLICATION FILED MAY6,1909.

933,01 9 Patented Aug. 31,1909.

sideral'lle length of time, as the flame of low heating power absorbs and deflects the heatradiated fronrthe tlame of hi h temperature and carries it toward the surface to be Welded and away from the hood.

in hi 1, 2 and 3, I have shown a single huruer oil: low heating power, in connection with a hurnerof high heating power, but in Fl". 5, l have shown a form of apparatus in which three hydrocarbon fluid fuel burners are used, so as to completely separate the hood from the [lame projected from the burner i\, and it will be understood that any number of burners may be used and in any manner desired without departing from the essential features of the invention, as the arrangenn-ut of the burners will depend considerably upon the shape of the article to be welded.

l n Fig. (3, I have shown a series of burners D one arranged in advance of" another, all using a hydrocarbon fuel and all in advance of the. burner A using acetylene and oxygen. These burners can be mounted upon a frame I or other support and this support can be moved over the plates or other articles to be welded, or the frame can be fixed and the plates moved. The same construction may he provided for the burner illust 'ated in Fig. l, where it.- is desired to locate the burner permanently in position and move the articles to be welded pastit.

it will be understood that the hydrocarhon fluid fuel burner may be used either with air or oxygen as desired, and l pref-' erably rovide the nozzles of the burners A and with a covering f, f of graphite or other refractory material, so

as to protect them -from the intense heat.

I. claim l. The combination of two'burners, one providing a flame of higher tenn erature than the other, the burner providing the low tei'nperatureflame being located in advance of the other burner, so as to pro-heat t .e surface to be acted upon by the flame from said other burner. I

2. The combination in a Welding apparates, of two burners, one burner being connected to tubes supplying oxygen and acety lene gas to produce a flame of high temperature, a second burner so located as to project seems a flame in advance of the flame from. the firstv burner, a tube connected to said second burner for supplyin a low grade of gas producing a flame 0% a lower temperature than the flame of the first mentioned burner, so that thesurface to be acted upon will be pre-heated before being subjected to the welding flame.

3. The combination of a burner supplying a flame of high temperature, a second burner supplying a flame of low temperature, with a, hood confining a flame from both bnrners.

4. The combination in a welding apps; ratns, of a burner, two pipes connected to the burner, one for supplying oxygen and the other for supplying inclosing the flame from said burner, with one or more burners connected to a pi e for supplying a hydrocarbon fluid fuel olicornparatively low lame temperature and ar ranged to project a flame between the flame from the first mentioned burner and the hood, said hood being connected to the burnso as to move with the burners over the surfaces to be welded.

5. The combination of a hood of graphite or analogous material, said hood being open at the bottom and at each end and narrower at one end than at the other, with a burner projecting into the narrow end of the hood;

(3. The combination of a hood of graphite or analogous material narrow at one end and enlarged at the opposite end, t projecting into the hood at the narrow end, means for supplying different gases to the burners producing peratures, the flame of low temperatnrs being projecting between the hood and the flame of high tempe'ature,

7. The combination of two burners, one providing a flame of a higher temperature than the other, a hood inelosing the burners and made of refractm'y material and. a noneondueting covering for each burner.

In. testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

(ll- ABLE S cnnisivmn.

wlitnesses; i

WM. l Snore, NM. A. Benn.

flames of different tern 

